Switch for devices for supplying paper to printing presses



J [nan/lath;

F E; 9 w

J. E. RUST Nov. 25, 1930.

SWITCH FOR DEVICES FOR SUPPLYING PAPER TO PRINTING PRESSES Filed July 28, 1927 Patented Nov. 25, 1930 Iran STATES P E T JAMES E. RUST, on PARK RIDGE, ILLINOIS, sssreivon ro GUSTAVUS A. E. K QHL ERQGF I CHICAGO, ILLINOIS, j I a swr'rcn ron'nnvrcns roe, snPrt In-s rnrnn Tornnterns rREssEs" f Application filed July 28, 19271 seiiaino. 209,020.

'lhisinvention relates to switches for devlces torsupplying paper to printing presses I j and has for its object to provide a new and The invention has as a .iurther-ob out the several figures. I

. ductors 10 running to the solenoids. conductors 10 are held in the terminals 9 by improved device of this description. I I

'ect to provide a push-button switch of this description forintroducing current into the solenoid of an electromagnetic switch. I j I I I The invention has further objects which are more particularly pointedout in the ac-.

coinpanyingdescription.

Referring now to the drawings, Fig. l is a plan View of one form of switch embodying the invention.

- Fig.2. is a sectional view taken on line 22,of Fig. 1. v I Fig. 3 is a sectional 'viewtaken on line as of. Fig. 1.

I Like numerals referto like parts through- Referring now to the drawings, the switch consists or a base 1 ofinsulating material adapted to. receive two contact devices con 7 nected with the base and the opposing spring 0 contacts 2 and 3 and 4 and 5. I T

Thesexcontacts are preferably arranged in grooves in the base. The base is provided with the holes 6 for the screws 7 which pass through the spring contactslto hold .them

, 'in position. Theholes 6 are enlarged at the I lower ends and are provided with shoulders 18 for the heads of the screws 7. I These screws also pass through the terminals 9 for the con- The the screws 11 which pass therethrough and I through the spring contacts. I These screws I project intoopenings 12 in the base, the open{ ings being larger than the screws as shown. The spring contacts 2 and 3 areelectrically connected by a movable contact 13 and the spring contacts 4 and are electrically connected by the contact 14. These contacts are a) connected with pushrods 15 and 16 by means of screws 1'? which worlr'in screw threaded openings, in thepush rods, The openings for these screws areenlarged at the end at 17 there being no I screw threads at that point.

i This allows clearance for thescrew. There isa possibility of the contacts being loosened turning when engaging the springacon- H 7 push rods are crnnped at theirends as shown at 17 tacts. To prevent this the Thepush rods areof insulating material.

l9vand 20. The push rodsare preferably roughened as shown at 17 so as to insure a better connection with the push buttons. The contacts '13 and 14 are normally held in their inoperativepositions, that is, awayfrom the springlcontacts 2, 3, 4, and 53 by springs 21 and 22 which are enclosed in the base 1. The

springs at one end engage the shoulders I and 24 and atthe other end, thepush buttons.

, It will be seen that when thepushbuttons are pressed, the contacts13 and 14 will be moved to connect the spring contacts 2 and3 -"and 4 and 5 and-thus complete the'circhit through thedevice with which the conductors "10 are connected. {When the pushrbuttons areireleased,fthesprings move the contacts 13 and 14 out of engagementwith the spring 3 contacts, thereby breaking the circuit;

I claim:

L A device of the lrind described compris ing a base of insulating material, said base having two flat: portions and aprojection be tween said flat portions, opposed separated spring contacts connected with the flatfpor tions of said base and extendingalong sald projection, the endsthere'of projecting beyond said projection, a third contactImovably connected with said base adapted to electrically connect the spring contacts and'means for automatically disconnecting thethird I contact from 1 the: s

contact is released.

ing a base of. insulating materialhaving a pro jection with aflat portionuon each side thereof,

opposed spring contacts connected with said flat portion and extending along said projec- I as deviceofthekinddescribedcompris tion, said projectionbein'g provided with an opening, said contacts havingtheir separated pring contacts when the end of said push rod adapted, when the push rod is moved in one direction to electrically connect said spring contacts and a retracting device for said push rod, said contact proj ecting laterally beyond the push rod and acting as a stop to limit the movement of the push rod responsive to the retracting device.

3. A device of the kind described comprising a base having a projection with a flat portion on each side thereof, opposed spring contacts connected with said flat portion and extending along said projection, said projection being provided with an opening, said contacts having their separated ends in proximity to said opening, a push rod of insulating material in said opening, a contact removably connected therewith adapted, when the push rod is moved in one direction to electrically connect said spring contacts,said push rod being at all times out of contact with said spring contacts, a push button connected with said push rod and a retracting spring surrounding said push rod.

4. A device of the kind described comprising a base having a projection with a flat portion on each side thereof, two sets of spring contacts connected with said flat portion and extending along said projection, said projection being provided with two openings one in alignment witheach set of spring contacts, push rods in said openings, each comprising a central portion of insulating material and a separate enlarged end of insulating material, conducting contacts connected with said push rods, said contacts at all times exterior to said. base and acting as stops to limit their movement away from the spring contacts and adapted when moved outwardly to electrically connect said spring contacts, and means for automatically disconnecting the contacts and the spring contacts when said spring contacts are released, comprising a spring surrounding the central portion of each push rod, one end'of each spring engagmg the enlarged end of the push rod, the other end engaging the base.

A device of the kind described comprising a base having an opening extending therethrough, two separated shoulders on the mt-e- -rior of said base at different points along said opening, a push rod in said opening, a spring surrounding said push rodandengaging one of said shoulders, a push button larger in digaged bysaid contact when it is moved to a predetermined position.

Signed at Chicago, county of Cook and State of Illinois, this 8th day of July, 1927.

JAMES E. RUST. 

